Paleoanthropologist Zeresenay Alemseged looks for the roots of humanity in Ethiopia's badlands. Here he talks about finding the oldest skeleton of a humanoid child — and how Africa holds the clues to our humanity.

Zeresenay "Zeray" Alemseged digs in the Ethiopian desert, looking for the earliest signs of humanity. His most exciting find: the 3.3-million-year-old bones of Selam, a 3-year-old hominid child, from the species Australopithecus afarensis.
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